River City: Knights of Justice (熱血魔法物語, Nekketsu Magical Story in Japan) is a beat 'em up role-playing game developed by Avit-Niigata and published by Natsume in North America and Europe and by Arc System Works in Japan for the Nintendo 3DS. As part of the Downtown Nekketsu sub-series, it plays similarly to Downtown Nekketsu Monogatari and Downtown Special: Kunio-kun no Jidaigeki da yo Zen'in Shūgō!, but the setting is now changed to medieval times.